Toyota ZZT230 series, Repair Manual

Page: 246 / 821

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Dl-35
DIAGNOSTICS
-
ENGINE
2
Check for open In harness or ECM.
er
Engine Coolant
ECM
1
E-
""" _,
PREPARATION:
(a)
Disconnect the engine coolant temp. sensor connector.
(b) Connect the sensor wire harness terminals together.
(c)
Turn the ignition switch ON. CHECK:
Read temperature value on the OBD
JJ
scan tool or TOYOTA
hand-held tester.
OK:
-
Temperature value: 140"C (284.F) or more
replace engine coolant temp. sensor.
3
Check for open In harness or ECM.
PREPARATION:
e/N
(a) Remove the ECM cover.
(b) Connect between terminals THW and E2 of the ECM con-
nectar.
Engine Coolant
ECM
HINT:
Temp.
Sensor
Engine coolant temp. sensor connector is disconnected. Be-
1
fore checking, do a visual and contact pressure check for the
ECM connector (See page IN-30).
(c) Tum the ignition switch ON.
CHECK:
Read temperature value on the OBD II scan tool or TOYOTA
hand-held tester.
OK: Temperature value: 140"C (284"F) or more
B
Open In harness between terminals E2 or THW,
repair or replace harness.
THVV
E2
-
"
""'
A
114GB
Confirm connection at ECM. If OK,
check replace ECM
(See
page IN-30).